The Byron Home Easy Wireless Magnetic Switch for windows, doors and closets. Automatically activates a Home Easy or Smartwares receiver if the contact is broken, i.e. a door is opened. Operates via a secured wireless signal that goes through doors, windows, walls and ceilings.
If windows/doors are opened you can switch lights on/off (E.g. Your loft light switches on automatically when the hatch is opened). You can also receive notifications on your phone if a door or window is opened while you are away.
This unit includes batteries and can be placed anywhere indoors. It is based on 433 MHz technology, and the signal passes through windows, doors, walls and ceilings up to a distance of 30 metres.
Battery: 3v type CR 2032 (Included).